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Texas Instruments SN74LVC244AQDWRQ1
- Part No.:
- SN74LVC244AQDWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC244AQDWRQ1.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,675
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Product details
Overview
SN74LVC244AQDWRQ1 from Texas Instruments is an automotive-qualified octal 3-state buffer/driver IC designed for asynchronous bus interfacing between 1.65V–3.6V logic domains. It provides two independent 4-bit banks with separate output-enable controls, 5.9ns max propagation delay at 3.3V, 5.5V-tolerant inputs, and operation across –40°C to +125°C - enabling robust signal routing in automotive body control modules and infotainment data buses.
For engineers reviewing the SN74LVC244AQDWRQ1 datasheet, SN74LVC244AQDWRQ1 pinout, SN74LVC244AQDWRQ1 application, or SN74LVC244AQDWRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, Ioff support for live insertion, mixed-mode (5V-in/3.3V-VCC) compatibility, and SOIC-20 package thermal performance under sustained automotive ambient conditions.
Technical Context
The SN74LVC244AQDWRQ1 implements two independent 4-bit noninverting buffer banks (1A→1Y and 2A→2Y), each controlled by a dedicated active-low output-enable pin (1OE, 2OE). Its CMOS architecture delivers balanced sourcing/sinking drive (±24mA at 3V), low ground bounce (<0.8V VOLP), and undershoot immunity (>2V VOHV), ensuring signal integrity on long PCB traces.
It supports partial power-down via Ioff, which limits current flow when VCC = 0V but input/output voltages range from –0.5V to 5.5V. The device meets JESD 17 latch-up immunity (>250mA) and operates across dual temperature ranges: –40°C to +85°C and –40°C to +125°C - validated per AEC-Q100 requirements for automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - enables direct interface with 1.8V, 2.5V, and 3.3V logic systems without level shifters. |
| Input Voltage Tolerance | Up to 5.5V - allows safe connection of 5V signals into 3.3V-powered systems without external clamping. |
| Max Propagation Delay | 5.9ns at 3.3V - supports high-speed data transfer up to ~170MHz clock-equivalent rates in buffered bus applications. |
| Output Drive Strength | ±24mA at VCC = 3V - sufficient to drive 50Ω transmission lines or multiple CMOS loads with minimal rise/fall time degradation. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and powertrain control unit environments per AEC-Q100 Grade 1. |
| Ioff Current | ±10µA max at 125°C - prevents back-drive and leakage during hot-plug or partial power-down sequences. |
| ESD Rating | ±2000V HBM - exceeds automotive ESD immunity requirements for assembly and field operation. |
Pinout & Package
SN74LVC244AQDWRQ1 is supplied in a 20-pin SOIC (DW) package measuring 12.80mm × 10.3mm, with 1.27mm lead pitch and RoHS-compliant NiPdAu finish. Thermal resistance RθJA = 58°C/W enables stable operation at full drive under automotive ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 19 | Bank 1 Output Enable (active-low) | Controls all four outputs (1Y1–1Y4); asserts high-impedance state when high - critical for bus arbitration and multi-drop topology isolation. |
| 11, 2A1 | Bank 2 Input A1 | Noninverting input for first channel of second buffer bank - accepts 5.5V-tolerant logic signals regardless of VCC. |
| 12, 1Y4 | Bank 1 Output Y4 | 3-state CMOS output with ±24mA drive capability - requires external pull-up/down only if left floating during high-Z state. |
| 10, GND | Ground reference | Primary return path for all I/O and supply currents; must be connected to low-impedance system ground plane to minimize noise coupling. |
| 20, VCC | Power supply | 1.65V–3.6V digital supply; requires local 0.1µF ceramic bypass capacitor placed adjacent to pin to suppress switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (–40°C to +125°C) certification ensures reliability in automotive powertrain, chassis, and ADAS subsystems. |
| Mixed-Mode Signal Operation | 5V-tolerant inputs enable seamless integration between legacy 5V sensors/microcontrollers and modern 3.3V domain controllers. |
| Ioff Support | Prevents current backflow during power sequencing or hot-swap events - essential for modular ECUs and reconfigurable wiring harnesses. |
| Low Ground Bounce | VOLP < 0.8V at 3.3V ensures clean logic thresholds even under simultaneous 8-output switching, reducing false triggering risk. |
| High-Drive 3-State Outputs | ±24mA drive strength maintains signal edge integrity over >12cm PCB traces - eliminates need for additional line drivers in body electronics. |
Applications
| Automotive Body Control Module | Infotainment Data Bus Interface |
|---|---|
Use Scenario: Isolating and buffering LIN or CAN sub-bus signals between gateway MCU and door module microcontrollers. IC Role / Device Role / Timing Role: Octal buffer providing direction-controlled signal pass-through with 3-state isolation during bus arbitration. Use Value: Enables shared bus topology with zero contention risk, leveraging Ioff and 5.5V input tolerance to interface diverse voltage-rail peripherals. |
Use Scenario: Level-shifting and driving display interface signals (e.g., RGB timing, touch controller SPI) from 3.3V SoC to 5V panel drivers. IC Role / Device Role / Timing Role: Noninverting buffer with precise 5.9ns tpd ensuring setup/hold compliance for parallel video interfaces. Use Value: Eliminates external level translators while maintaining signal fidelity across long flex-cable runs due to high drive and low ground bounce. |
| Engine Control Unit Signal Conditioning | ADAS Camera Sensor Interface |
Use Scenario: Combining multiple "power good" status signals from DC-DC converters into a single fault indicator for engine management MCU. IC Role / Device Role / Timing Role: Wired-OR logic implementation using 3-state outputs driven by open-drain sources. Use Value: Reduces component count versus discrete diode-OR networks and improves noise immunity via CMOS threshold stability over temperature. |
Use Scenario: Driving high-capacitance MIPI CSI-2 parallel clock or sync lines from image sensor to host processor in rear-view camera modules. IC Role / Device Role / Timing Role: Low-skew buffer replicating clock edges to multiple receivers with matched tpd across all eight channels. Use Value: Maintains inter-channel skew <1.5ns (tsk(o)), preventing timing violations in pixel-data capture windows under automotive vibration and thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWRE4Q1 | TSSOP-20 package (6.5mm × 6.4mm); RθJA = 83°C/W - higher thermal resistance than SOIC-20. | Better PCB area efficiency but reduced power dissipation margin in sealed enclosures above 85°C ambient. | Select when board space is constrained and thermal derating can be accommodated via layout or airflow. |
| SN74LVC244ADGSRQ1 | VSSOP-20 package (5.1mm × 4.9mm); RθJA = 87.2°C/W - smallest footprint but highest thermal impedance. | Suitable for compact modules with short duty cycles; not recommended for continuous 24mA output loading at 125°C. | Choose only for space-critical infotainment accessories where peak power is brief and ambient stays below 105°C. |
Compared with SN74LVC244AQDWRQ1, the TSSOP and VSSOP alternatives offer smaller footprints but require careful thermal design due to 43–50% higher junction-to-ambient resistance - making the SOIC-20 version preferred for sustained high-drive automotive applications requiring full temperature-range reliability.
Availability
SN74LVC244AQDWRQ1 is available at Aetrix Electronics and suitable for automotive body control, infotainment interface, and ADAS sensor signal conditioning applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for SN74LVC244AQDWRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade logic solutions, with decades of experience delivering high-reliability components for safety-critical systems.
The SN74LVC244AQDWRQ1 belongs to TI's automotive LVC logic family, engineered specifically for robust signal buffering in harsh-temperature vehicle networks - emphasizing Ioff protection, wide VCC range, and AEC-Q100 validation.
FAQ
What automotive qualification does SN74LVC244AQDWRQ1 meet?
SN74LVC244AQDWRQ1 is AEC-Q100 qualified Grade 1, rated for operation from –40°C to +125°C and tested for reliability in automotive environments including humidity, thermal cycling, and mechanical shock. It meets all stress test requirements defined in the AEC-Q100 standard for integrated circuits used in passenger vehicles.
Can SN74LVC244AQDWRQ1 interface 5V signals with a 3.3V power supply?
Yes, SN74LVC244AQDWRQ1 supports mixed-mode operation: its inputs tolerate up to 5.5V regardless of VCC, allowing direct connection of 5V logic signals while powered from 3.3V. This eliminates external level shifters in hybrid-voltage automotive subsystems such as instrument cluster interfaces.
What is the maximum output drive capability of SN74LVC244AQDWRQ1 at 3.3V?
At VCC = 3.3V, SN74LVC244AQDWRQ1 delivers ±24mA per output (IOL = 24mA, IOH = –24mA), verified across –40°C to +125°C. This drive strength sustains fast edge rates into 50Ω transmission lines or fan-out-of-10 CMOS loads without waveform degradation.
How does Ioff functionality benefit system design with SN74LVC244AQDWRQ1?
Ioff in SN74LVC244AQDWRQ1 disables current flow when VCC = 0V but input/output pins remain biased - enabling safe live insertion of modules, partial power-down of subsystems, and prevention of back-drive damage during firmware updates or ECU reconfiguration sequences.
What package type is used for SN74LVC244AQDWRQ1?
SN74LVC244AQDWRQ1 uses the SOIC-20 (DW) package: 12.80mm × 10.3mm body, 1.27mm lead pitch, NiPdAu lead finish, and moisture sensitivity level 1 (MSL-1) - compatible with standard automotive PCB assembly processes and offering optimal thermal performance (RθJA = 58°C/W) among LVC244A-Q1 variants.
SN74LVC244AQDWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LVC244AQDWRQ1 FAQ
1.How can I place an order for SN74LVC244AQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC244AQDWRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LVC244AQDWRQ1 reliable?
The price and inventory of SN74LVC244AQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC244AQDWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74LVC244AQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC244AQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC244AQDWRQ1?
SN74LVC244AQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC244AQDWRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LVC244AQDWRQ1?
For technical support, including SN74LVC244AQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC244AQDWRQ1 requirements.
6.How does Aetrix verify that SN74LVC244AQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LVC244AQDWRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC244AQDWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LVC244AQDWRQ1?
All SN74LVC244AQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC244AQDWRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LVC244AQDWRQ1 part is unused and in its original packaging.
Return procedure for SN74LVC244AQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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